We're dividing 731215 by 57 
The aim is to understand the frequency of 57 in 731215.

Let's proceed to step 1:
When dividing 7 by 57, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 57

Moving on to step 2:
The number 57 fits into 73 1 times, leaving a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 57 away from 73, we end up with 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 57

Moving on to step 3:
161 divided by 57 is 2 with a remainder of 47.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtracting 114 from 161 leaves us with 47.
Append the next digit (2) from the dividend to 47 and continue with: 472 / 57

Step 4:
The number 57 fits into 472 8 times, leaving a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 128.0
If we subtract 456 from 472, we get 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 57

Moving on to step 5:
57 can be fit into 161 2 times, resulting in a remainder of 47.
Use 2 as the next digit of our solution. 
Result so far: 1282.0
Deduct 114 from 161 and we're left with 47.
Include the next digit (5) from the dividend after 47, then repeat: 475 / 57

Advancing to step 6:
57 can be fit into 475 8 times, resulting in a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 12828.0
The remainder is 19 after subtracting 456 from 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 7:
When dividing 190 by 57, we get 3 with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 12828.3
If we subtract 171 from 190, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
The number 57 fits into 190 3 times, leaving a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 12828.33
Subtracting 171 from 190 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final outcome is 12828.33, with a leftover of 0.019.